class_docstr: data dictionary for pushing to tb
      
code: def __init__(self):
      self.SCALAR_NAME = "scalar"
      self.HISTOGRAM_NAME = "histogram"
      self.IMAGE_NAME = "image"
      self.TEXT_NAME = "text"
      self.datapack = {}
      self.datapack[self.SCALAR_NAME] = {}
      self.datapack[self.HISTOGRAM_NAME] = {}
      self.datapack[self.IMAGE_NAME] = {}
      self.datapack[self.TEXT_NAME] = {}
  
imports: import abc
  import tensorboardX
label_desc: Use image node_id 1 to create a new TensorboardDatapack object  with example: obj = TensorboardDatapack()